Newbie Panorama
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Written by Petri   

Small-world
I have been doing little learning exercises with the Blender 3D modeling software. Some of these tests have involved trying out HDRI lighting for 3D scenes. Earlier I have not been that interested specifically in shooting panoramas. However, now with this new angle to it, I was motivated enough to do some research.

Shooting panoramas is now starting to become pretty interesting topic for travel pictures -  travel pictures will be more interesting, when some of them are shot as immersive panoramas viewable on computer and on web browsers.The same applies to shooting HDRI images as well.

I recently bought Samyang 8mm F/3.5 Fisheye lens (review1, review2) and here are my very first panorama test pictures. There obviously are some stitching artefacts due to parallax erros etc... Anyhow, I was pretty impressed with what you can do with free software.I do realise now though that taking good panorama pictures will require carrying around both tripod stand and specific panoramic head (e.g. Panosaurus or one of the expensive ones) to remove/reduce parallax errors that show up as problems in the stitching the panorama.

The specifics:

  • Nikon D80 + Samyang 8mm F/3.5 Fisheye
  • Pictures taken as RAW (NEF) and converted to 16-bit TIFF with Nikon NX sw (comes with camera)
  • Hugin (good tutorials) + Autopano-sift-c with feature identification suited better for fisheye projection enabled. I have to admit that the autopano-sift-c truly finds better matches than normal autopano, so it is worth installing/compiling.
  • No post-processing in these test pictures (GIMP/Photoshop). Only automatic panorama creation in Hugin + some own control points.
  • The only commercial software component: Pure starter toolkit package by ImmerVision for (portable) panorama creation and for viewing. Other alternatives exist.
  • Obviously there are stitching errors (panosaurus ordered :-)

  Check out my test pictures and see how the Pure Java panorama player works for you.

 


Hugin Autopano-sift-c parameters:

  • --stereographic 1 --lens-type 3 --projection %f,%v --maxmatches %p %o %i 

Samyang 8mm F/3.5 Fisheye Lens data (horizontal from web):

  • Degrees of view (v): 147.9
  • Focal Length: 9.28567
  • Crop Factor (on N80): 1.5
  • Distortion (a): 0.01417
  • Barrel (b): 0.01164
  • Distortion (c): 0

Samyang 8mm F/3.5 Fisheye Lens data (vertical/portrait from web):

  • Degrees of view (v): 104.2
  • Focal Length:13.17994
  • Crop Factor (on N80): 1.5
  • Distortion (a): 0.01417
  • Barrel (b): 0.01164
  • Distortion (c): 0

Autopano has been able to work with this data, but I have not really calibrated myself to be sure. Focal length get set after degrees of view is known... There maybe something odd here, but as the values seem to work I don't complain.

 

 

 

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  Comments (1)
Written by Pave, on 30.03.2010 14:05
Noi 360 kuvat näyttää hauskoilta, voisi joskus ehkä harkita koittavansa jos vain saisi puristettua aikaa niille. Nyt aika menee tavan kuvien tekemiseen eikä riitäkkään :(

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